Final answer:
Brain size does play a role in intelligence, but it is not the sole determinant. Other factors, such as brain organization, also contribute.
Step-by-step explanation:
The student's statement is partially correct. In intelligent mammals, such as primates, the cerebrum is indeed larger compared to the rest of the brain. This larger cerebrum allows primates to develop higher levels of intelligence and engage in complex social interactions. However, it is important to note that brain size alone does not determine intelligence. Other factors, such as the organization and development of different anatomical areas of the brain, also play a role.